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Add IMPLY() and EQUIV() macros

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Added for upstream compatibility, they are of the form:

* IMPLY(a, b) - if (a) then (b)
* EQUIV(a, b) - if (a) then (b) *AND* if (b) then (a)

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf 2015-06-24 13:54:06 -07:00
parent 72540ea314
commit fa720217b9
1 changed files with 17 additions and 1 deletions
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18
lib/libspl/include/assert.h
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@ -63,6 +63,13 @@ __assert_c99(const char *expr, const char *file, int line, const char *func)
extern void __assert(const char *, const char *, int);
static inline int
assfail(const char *buf, const char *file, int line)
{
__assert(buf, file, line);
return (0);
}
/* BEGIN CSTYLED */
#define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) do { \
const TYPE __left = (TYPE)(LEFT); \
@ -72,7 +79,7 @@ extern void __assert(const char *, const char *, int);
(void) snprintf(__buf, 256, "%s %s %s (0x%llx %s 0x%llx)", \
#LEFT, #OP, #RIGHT, \
(u_longlong_t)__left, #OP, (u_longlong_t)__right); \
__assert(__buf, __FILE__, __LINE__); \
assfail(__buf, __FILE__, __LINE__); \
} \
} while (0)
/* END CSTYLED */
@ -88,12 +95,21 @@ extern void __assert(const char *, const char *, int);
#define ASSERT3P(x, y, z) ((void)0)
#define ASSERT0(x) ((void)0)
#define ASSERTV(x)
#define IMPLY(A, B) ((void)0)
#define EQUIV(A, B) ((void)0)
#else
#define ASSERT3S(x, y, z) VERIFY3S(x, y, z)
#define ASSERT3U(x, y, z) VERIFY3U(x, y, z)
#define ASSERT3P(x, y, z) VERIFY3P(x, y, z)
#define ASSERT0(x) VERIFY0(x)
#define ASSERTV(x) x
#define IMPLY(A, B) \
((void)(((!(A)) || (B)) || \
assfail("(" #A ") implies (" #B ")", __FILE__, __LINE__)))
#define EQUIV(A, B) \
((void)((!!(A) == !!(B)) || \
assfail("(" #A ") is equivalent to (" #B ")", __FILE__, __LINE__)))
#endif /* NDEBUG */
#endif /* _LIBSPL_ASSERT_H */